Pay attention to furnace smells. A metallic or burning odor could mean overheated electrical components. A musty smell suggests moisture or mold in the ducts. And if you ever detect a sulfur or rotten ...
Key Points Check thermostat settings, filters, and fuel supply first when your furnace blows cold air.Call an HVAC technician for issues like sensor failures, clogged burners, or duct leaks.Skipping ...
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